[USN-6935-1] Prometheus Alertmanager vulnerability

[Vyom Yadav]

==========================================================================
Ubuntu Security Notice USN-6935-1
July 31, 2024

prometheus-alertmanager vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

prometheus-alertmanager could be made to expose sensitive information over
the network.

Software Description:
- prometheus-alertmanager: handle and deliver alerts created by Prometheus

Details:

It was discovered that prometheus-alertmanager didn't properly sanitize
input it received through an API endpoint. An attacker with permission to
send requests to this endpoint could potentially inject arbitrary code.

On Ubuntu 20.04 LTS and Ubuntu 22.04 LTS, this vulnerability is only
present if the UI has been explicitly activated.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
   golang-github-prometheus-alertmanager-dev  0.23.0-4ubuntu0.2+esm1
                                   Available with Ubuntu Pro
   prometheus-alertmanager         0.23.0-4ubuntu0.2+esm1
                                   Available with Ubuntu Pro

Ubuntu 20.04 LTS
   golang-github-prometheus-alertmanager-dev  0.15.3+ds-3ubuntu1.2
   prometheus-alertmanager         0.15.3+ds-3ubuntu1.2

Ubuntu 18.04 LTS
   golang-github-prometheus-alertmanager-dev  0.6.2+ds-3ubuntu0.1+esm1
                                   Available with Ubuntu Pro
   prometheus-alertmanager         0.6.2+ds-3ubuntu0.1+esm1
                                   Available with Ubuntu Pro

On Ubuntu 20.04 LTS and Ubuntu 22.04 LTS, once the updates have been
installed, you need to recompile and reinstall the UI components and
restart the prometheus-alertmanager service afterwards.

On Ubuntu 18.04 LTS, a standard system update will make all the necessary
changes.

References:
   https://ubuntu.com/security/notices/USN-6935-1
   CVE-2023-40577

Package Information:
   https://launchpad.net/ubuntu/+source/prometheus-alertmanager/0.15.3+ds-3ubuntu1.2

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